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The key challenge in semantic search is to create models that are both accurate and efficient in pinpointing relevant sentences for queries. While BERT-style bi-encoders excel in efficiency with pre-computed embeddings, they often miss…

Computation and Language · Computer Science 2024-06-26 Zihan Liao , Hang Yu , Jianguo Li , Jun Wang , Wei Zhang

Information retrieval is a cornerstone of modern knowledge acquisition, enabling billions of queries each day across diverse domains. However, traditional keyword-based search engines are increasingly inadequate for handling complex,…

Aspect-oriented explanations in search results are typically concise text snippets placed alongside retrieved documents to serve as explanations that assist users in efficiently locating relevant information. While Large Language Models…

Information Retrieval · Computer Science 2025-07-23 Arif Laksito , Mark Stevenson

Generative models powered by Large Language Models (LLMs) are emerging as a unified solution for powering both recommendation and search tasks. A key design choice in these models is how to represent items, traditionally through unique…

Large Language Models (LLMs) excel at capturing latent semantics and contextual relationships across diverse modalities. However, in modeling user behavior from sequential interaction data, performance often suffers when such semantic…

Computation and Language · Computer Science 2025-10-22 Mahsa Valizadeh , Xiangjue Dong , Rui Tuo , James Caverlee

The presence of social biases in large language models (LLMs) has become a significant concern in AI research. These biases, often embedded in training data, can perpetuate harmful stereotypes and distort decision-making processes. When…

Information Retrieval · Computer Science 2025-11-04 Amirabbas Afzali , Amirreza Velae , Iman Ahmadi , Mohammad Aliannejadi

Classical search engines using indexing methods in data infrastructures primarily allow keyword-based queries to retrieve content. While these indexing-based methods are highly scalable and efficient, due to a lack of an appropriate…

Information Retrieval · Computer Science 2025-09-30 Nafis Tanveer Islam , Zhiming Zhao

Retrieval and recommendation are two essential tasks in modern search tools. This paper introduces a novel retrieval-reranking framework leveraging Large Language Models (LLMs) to enhance the spatiotemporal and semantic associated mining…

Information Retrieval · Computer Science 2024-11-21 Yuanyuan Tian , Wenwen Li , Lei Hu , Xiao Chen , Michael Brook , Michael Brubaker , Fan Zhang , Anna K. Liljedahl

Discovering efficient algorithms for solving complex problems has been an outstanding challenge in mathematics and computer science, requiring substantial human expertise over the years. Recent advancements in evolutionary search with large…

Artificial Intelligence · Computer Science 2026-05-26 Anja Surina , Amin Mansouri , Lars Quaedvlieg , Amal Seddas , Maryna Viazovska , Emmanuel Abbe , Caglar Gulcehre

Many search systems work with large amounts of natural language data, e.g., search queries, user profiles, and documents. Building a successful search system requires a thorough understanding of textual data semantics, where deep learning…

Information Retrieval · Computer Science 2021-08-31 Weiwei Guo , Xiaowei Liu , Sida Wang , Michaeel Kazi , Zhiwei Wang , Zhoutong Fu , Jun Jia , Liang Zhang , Huiji Gao , Bo Long

Large language models (LLMs) exhibit strong semantic understanding, yet struggle when user instructions involve ambiguous or conceptually misaligned terms. We propose the Language Graph Model (LGM) to enhance conceptual clarity by…

Computation and Language · Computer Science 2025-11-06 Wenchang Lei , Ping Zou , Yue Wang , Feng Sun , Lei Zhao

With extensive pre-trained knowledge and high-level general capabilities, large language models (LLMs) emerge as a promising avenue to augment reinforcement learning (RL) in aspects such as multi-task learning, sample efficiency, and…

Machine Learning · Computer Science 2024-11-21 Yuji Cao , Huan Zhao , Yuheng Cheng , Ting Shu , Yue Chen , Guolong Liu , Gaoqi Liang , Junhua Zhao , Jinyue Yan , Yun Li

Recently embedding-based retrieval or dense retrieval have shown state of the art results, compared with traditional sparse or bag-of-words based approaches. This paper introduces a model-agnostic doc-level embedding framework through large…

Information Retrieval · Computer Science 2024-04-10 Mingrui Wu , Sheng Cao

Context graphs are essential for modern AI applications including question answering, pattern discovery, and data analysis. Building accurate context graphs from structured databases requires inferring join relationships between entities.…

Databases · Computer Science 2026-03-05 Shivani Tripathi , Ravi Shetye , Shi Qiao , Alekh Jindal

The widespread adoption of large language models (LLMs) has created an urgent need for robust tools to detect LLM-generated text, especially in light of \textit{paraphrasing} techniques that often evade existing detection methods. To…

Computation and Language · Computer Science 2024-11-21 Weiqing He , Bojian Hou , Tianqi Shang , Davoud Ataee Tarzanagh , Qi Long , Li Shen

We propose a novel framework that leverages large language models (LLMs) to guide the rank selection in tensor network models for higher-order data analysis. By utilising the intrinsic reasoning capabilities and domain knowledge of LLMs,…

Machine Learning · Computer Science 2024-10-15 Giorgos Iacovides , Wuyang Zhou , Danilo Mandic

Building high-quality datasets and labeling query-document relevance are essential yet resource-intensive tasks, requiring detailed guidelines and substantial effort from human annotators. This paper explores the use of small, fine-tuned…

Information Retrieval · Computer Science 2025-04-15 Quentin Fitte-Rey , Matyas Amrouche , Romain Deveaud

Transformer networks, particularly those achieving performance comparable to GPT models, are well known for their robust feature extraction abilities. However, the nature of these extracted features and their alignment with human-engineered…

Information Retrieval · Computer Science 2025-07-23 Tanya Chowdhury , Atharva Nijasure , James Allan

Large language models (LLMs) are probabilistic in nature and perform more reliably when augmented with external information. As complex queries often require multi-step reasoning over the retrieved information, with no clear or…

Information Retrieval · Computer Science 2026-04-10 Roxana Petcu , Evangelos Kanoulas , Maarten de Rijke

Recent research has highlighted that Large Language Models (LLMs), even when trained to generate extended long reasoning steps, still face significant challenges on hard reasoning problems. However, much of the existing literature relies on…

Artificial Intelligence · Computer Science 2025-05-29 Fanzeng Xia , Yidong Luo , Tinko Sebastian Bartels , Yaqi Xu , Tongxin Li